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    <a href="../index.html">cppreference.com</a> &gt; <a href=
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    memchr
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  <div class="syntax-name-format">
    Syntax:
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  <pre class="syntax-box">
  #include &lt;string.h&gt;
  void *memchr( const void *buffer, int ch, size_t count );
</pre>

  <p>The memchr() function looks for the first occurrence of
  <em>ch</em> within <em>count</em> characters in the array pointed to
  by <em>buffer</em>. The return value points to the location of the
  first occurrence of <em>ch</em>, or <strong>NULL</strong> if
  <em>ch</em> isn&#39;t found. For example:</p>
  <pre class="example-code">
   char names[] = &quot;Alan Bob Chris X Dave&quot;;
   if( memchr(names,&#39;X&#39;,strlen(names)) == <strong>NULL</strong> )
     printf( &quot;Didn&#39;t find an X\n&quot; );
   else
     printf( &quot;Found an X\n&quot; );                
</pre>

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    Related topics:
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    <a href="memcmp.html">memcmp</a><br>
    <a href="memcpy.html">memcpy</a><br>
    <a href="strstr.html">strstr</a>
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